In one case, he said he billed the district for 75 hours of work instead of 0.75 of an hour, for a 45-minute conference on a property-tax appeal.

His bill was £6,600 instead of £66, according to the newspaper's review. Education officials said they hadn't noticed anything unusual about Mr Van Rensler's invoices before the newspaper's investigation and said they didn't believe the errors were intentional.